Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Cherry Creek, CO

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:50AMSunset 4:41PM Tuesday November 21, 2017 3:20 AM MST (10:20 UTC) Moonrise 10:26AMMoonset 8:23PM Illumination 8% Phase: Waxing Crescent; Moon at 3 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Cherry Creek, CO
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location: 39.64, -104.86     debug


Area Discussion for - Denver/Boulder, CO
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Fxus65 kbou 211017
afdbou
area forecast discussion
national weather service denver boulder co
317 am mst Tue nov 21 2017

Short term (today and tonight)
issued at 315 am mst Tue nov 21 2017
150 kt jet in northwest flow aloft is pushing into the state
early this morning, with the left exit region positioned over the
forecast area. Strong winds continue to create difficult travel
conditions in blowing snow in the high terrain. These winds are
also pushing down the leeslopes over the foothills and urban
corridor. Gusts of 30 to 50 mph will be slowly diminishing through
the morning. Snowfall rates will be at their MAX until about 6 am,
then start trending downward as the best dynamics head south.

Looking at snotel data, currently around 1 to 2 inches of snow has
likely fallen around the area, except over near rabbit ears pass
where perhaps around 4 inches have fallen. Steamboat cameras
showing around 4 or 5 inches, favored by northwest flow. Expect
another inch or two to fall between now and 6 am, then snowfall
rates will back off with lighter snow to fall through the rest of
the morning and afternoon.

The surface cold front associated with this jet has now just
pushed through scottsbluff and torrington in wyoming. This front
will push into the plains around of after sunrise with cooler air
on northeasterly winds. This front will likely kick off isolated
to scattered rain showers mid-morning, with clearing by the
afternoon. Temperatures today will be 10 to 20 degrees cooler than
yesterday, back near seasonal normals. The plains should see upper
40s to low 50s while the high country will be in the 30s to low
40s as the snow tapers off. Some rain may mix in in the late
afternoon in the high valleys.

Mostly clear skies this evening will cloud up again through the
night as another disturbance in the northwest flow aloft pushes
down. Another lee side surface trough will deepen to bring more
gusty winds in the high terrain and foothills overnight. Gusts of
25 to 40 mph will moderate minimum temperatures to warmer than
average for late november. A few light orographic snow showers
will continue in the high country, mainly along western slopes
with little to no accumulation.

Long term (Wednesday through Monday)
issued at 315 am mst Tue nov 21 2017
pattern becomes somewhat benign in the long term as the deep
ridge currently over the pacific will make its way NW pushing the
jet to the north of the state.

For Wednesday remnants of the jet will still impact portions of ne
co with moisture moving over the top and bringing continued light
orographic rain and snow to the higher, west facing slopes of the
park range and portions of the northern front range. Models show 700
mb temperatures staying mild so a mix of rain and snow with little
to no additional accumulation is expected. Temperatures will
gradually warm from Tuesday with highs in the mid to upper 60s. For
Thursday, high pressure will build with continued subsidence over
the region. A lee side low will develop Thursday allowing for a
continued downslope pattern to persist allowing for much warmer
then average temperatures. Model 700mb output puts temperatures 3
to 4 degrees above Wednesday highs with values in the low 70s.

Current record high for Thursday stands at 74... This will be
flirted with.

For Friday into the weekend the jet will drop south bringing a piece
of energy over the northern mountains giving another round of rain
and snow to that region. On the plains, with the NW orientation of
the system areas will remain dry with gusty downslope winds.

Conditions will remain partly cloudy with highs in the low 60s for
Saturday and upper 60s on Sunday.

Monday will see a slight breakdown in the ridge bringing an upper
level tough into northern co along with a cold front to the plains
by early Tuesday. Some precipitation will be possible in the
mountains will cooler temperatures on the plains.

Aviation (for the 12z tafs through 12z Wednesday morning)
issued at 315 am mst Tue nov 21 2017
vfr ceilings and visibilities expected over the next 24 hours.

Strong and gusty northwesterly winds from the mountain wave
pattern continue to translate over the area airports, making
directions a bit variable. Overall thinking the northwesterly
direction may win out ahead of the approaching cold front,
expected around 14z, bringing gusty northeast winds. Post frontal
ceilings should be around 060 kft agl at 15-18z this morning
before scattering out. Winds will then trend to drainage
overnight.

Bou watches warnings advisories
None.

Short term... Kriederman
long term... Bowen
aviation... Kriederman


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Denver - Centennial Airport, CO6 mi27 minNW 12 G 1910.00 miMostly Cloudy54°F23°F30%1011.3 hPa
Buckley Air Force Base Airport, CO9 mi82 minNW 1410.00 miMostly Cloudy52°F16°F24%1009.8 hPa
Denver, Denver International Airport, CO18 mi27 minW 910.00 miMostly Cloudy50°F19°F30%1010 hPa
Denver Nexrad, CO20 mi29 minN 410.00 miFair50°F21°F33%1015.9 hPa
Broomfield / Jeffco, CO23 mi37 minWNW 17 G 2210.00 miFair52°F23°F32%1015.6 hPa

Wind History from APA (wind in knots)
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Last 24hrS11SW6S5SE5SE9S7SW6E4CalmS4NW8NW12NW12NW114S6SE3E7CalmSW6NW11NW15NW10NW12
G19
1 day agoE7S7SW9S8S9SE10SW10SW10SW10SW9CalmNW5N5SE5S8SE5S8SW10SW11SW10SW11SW10S10S12
2 days agoN7NW6NW7E3S5SE4S8S10S9SE7CalmW11NW4NW7S4SE8SE6S65S7S6S6E63

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralPlains    EDIT
Geos

Wind Forecast for Denver/Boulder, CO (5,6,7,8)
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Ground Weather Radar Station Denver/Boulder, CO
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.